"There isn't any correlation between holding socially conservative values and violent extremism," he said. "Some studies actually suggest being more devout is actually a protective factor."

Dr Siddique says that while Muslim schools are faring the worst when it comes to no-notice inspections, Christian and Jewish schools are also being targeted.

Ofsted told Premier in a statement: “Ofsted holds all schools to the same standards, regardless of their ethos.

“Ofsted inspects independent schools at the request of the Department for Education (DfE). All independent schools have to meet the Independent School Standards. These are regulations set by the DfE. The independent school standards set out basic expectations about what schools should do to ensure that pupils receive a broad education and are well prepared for life in Britain society.”

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